x86: vdso: Use seqcount instead of seqlock

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The update of the vdso data happens under xtime_lock, so adding a
nested lock is pointless. Just use a seqcount to sync the readers.

Reviewed-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>

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Thomas Gleixner 2012-02-28 19:46:04 +00:00 • committed by John Stultz

parent 6c260d5863

commit 2ab516575f

3 changed files with 12 additions and 17 deletions

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2

arch/x86/include/asm/vgtod.h

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11

arch/x86/kernel/vsyscall_64.c

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16

arch/x86/vdso/vclock_gettime.c

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